Fix jquery ui effects

I've isolated this to this commit: https://github.com/sferik/rails_admin/commit/3704f60ae2d2e761ccc99735167fc7e83b311d56 which upgraded `jquery-ui-rails` from version 2 to version 3.

Version 3 of `jquery-ui-rails` (https://github.com/joliss/jquery-ui-rails/commit/d9273ba745fc6813dd55951dabab765b7dff7e94) changed the names of a bunch of files.

This should fix https://github.com/sferik/rails_admin/issues/1470.